Problems with error logs under mpm_worker

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Hi,

I've tried to find some answers to this by searching the list archives
and Google, but haven't been able to find anything matching my
circumstances.  Hopefully someone here can help me figure this out, or
point me in the right direction for me to solve it myself.

I've recently switched my server over to using mpm_worker rather than
mpm_prefork, and I'm having problems with much reduced information in
the error logs.

Whereas before I might see something like this:

[Wed Feb 17 10:58:37 2010] [error] [client 114.198.145.132] [pid 23028]
main: filename = support_menu.pl

I now only see:

[pid 1254] main: filename = support_menu.pl

In addition, it seems that any ErrorLog entries in my vhosts are
ignored, and only the main ErrorLog entry is used.

I am running Apache 2.2.14 (patched with CVE-2009-3555-2.2.patch), built
with the following configure options:

"./configure" \
"--prefix=/usr/local/apache" \
"--disable-userdir" \
"--enable-rewrite" \
"--enable-so" \
"--enable-info" \
"--enable-status" \
"--enable-ssl" \
"--enable-cgi" \
"--enable-unique-id" \
"--enable-mime-magic" \
"--with-included-apr" \
"--with-mpm=worker" \
"$@"

I have modsecurity on this Apache installation also, however I've tried
disabling it and still see the same behaviour.

Upon switching back to mpm_prefork, logs act as I've come to expect in
the past.

I haven't seen any notes about a difference in logging behaviour between
prefork and worker, but maybe I've not dug deep enough?

The OS platform is Debian 4.0 if that's relevant, and the prefork and
worker sections of the httpd.conf are pretty much the defaults:

# prefork MPM
<IfModule mpm_prefork_module>
    ServerLimit        1000
    StartServers          5
    MinSpareServers       5
    MaxSpareServers      10
    MaxClients          250
    MaxRequestsPerChild   0
</IfModule>

# worker MPM
<IfModule mpm_worker_module>
    StartServers         10
    MaxClients          150
    MinSpareThreads      25
    MaxSpareThreads      75
    ThreadsPerChild      25
    MaxRequestsPerChild   0
</IfModule>

Definitely appreciate any advice anyone can give.  Again, this only
seems to happen when switching from prefork to worker, disabling
modsecurity, switching back to Apache 2.2.13 don't seem to have any
effect.

Thanks,

Ross Lawrie.


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